ii.
The first and the last terms of an A.P. are 13 and 216 respectively. The common
difference is 7. How many terms are there in that A.P.? Also, find the sum of
all the terms in it. [Ans]

iii.
In the given experiment, write sample space S and the events P and Q. Write
also n(S), n(P) and n(Q). Three coins are tossed simultaneously. P is the event
of getting at least two heads and Q is the event of getting no head. [Ans]

iv.
Below is given the distribution of money in (Rs.) collected by students for a
flood relief fund. [Ans]

Money
(in Rs.)

0
– 10

10
– 20

20
– 30

30
– 40

40
– 50

No.
of students

5

7

5

2

6

Find
the Mean of money collected by a student by using 'Direct Method'.

v.
The number of hours spent by a school boy in different activities in a day is
given below: [Ans]